应用反射波法进行桩底探岩

分析研究表明,反射波探岩的原理类似于测桩,通过分析激振波在介质中传播时遇到波阻抗不同介质形成的波阻抗界面产生的反射波,从而判断桩底有无溶洞、破碎带或软弱夹层。笔者论述了如何辨别反射波来自桩底或桩周的依据和方法。工程实例表明,采用反射波进行桩底探岩不仅效率高、费用省,而且准确度高,是一种可以推广的方法。

A DISCUSSION ON THE APPLICATION OF THE REFLECTION WAVE METHOD TO THE PROSPECTING OF DOWN-PILE ROCKS

A study and analysis of the reflection wave method show that the prospecting of down-pile rocks by the reflection wave method has the same effect as diagnosing pile integrity based on the reflection wave method.Whether there exists a corrosion or a stratigraphic shatter zone or not can be judged on the basis of the curve of the reflection wave method.This paper also deals with the differentiation of the reflection wave derived from the down-pile rocks from that derived from rocks around the pile.In-situ tests show that the reflection wave method is cheap,efficient and accurate in prospecting of down-pile rocks.Therefore,it is worth popularizing.